# US 10,308,778 B2 · Preparation and application of dynamic non-wicking PU foam

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- Number: US 10,308,778 B2
- Document ID: US10308778B2
- Status: Granted
- Kind: B2
- Application number: 15/318,558
- Filed: 2014-11-25
- Published: 2017-05-11
- Granted: 2019-06-04
- Earliest claimed: 2014-11-25
- Assignees: Crecimento Industrial Co., Ltd.
- Applicants: Crecimiento Industrial Co., LTD.
- Inventors: Shaowu Cai; Xingshu Li; Wei Zeng; Zhihong Zeng; Shizhu Ma
- Web page: https://patentgrep.com/patent/US10308778B2

## CPC

- C08J 9/0023: {containing oxygen}
- A43B 1/10: made of rubber
- A43B 7/12: Special watertight footwear (overshoes A43B3/16)
- A43B 7/125: {provided with a vapour permeable member, e.g. a membrane (A43B23/022 takes precedence)}
- A43B 23/0215: {Plastics or artificial leather}
- A43B 23/022: {with waterproof breathable membranes}
- C08G 18/244: {tin salts of carboxylic acids}
- C08G 18/281: {Monocarboxylic acid compounds}
- C08G 18/2825: {having at least 6 carbon atoms}
- C08G 18/2865: {Compounds having only one primary or secondary amino group; Ammonia}
- C08G 18/48: Polyethers
- C08G 18/4808: {Mixtures of two or more polyetherdiols}
- C08G 18/7621: {being toluene diisocyanate including isomer mixtures}
- C08J 9/0028: {containing nitrogen}
- C08J 9/0052: {Organo-metallic compounds}
- C08G 2110/0083: prepared using water as the sole blowing agent
- C08J 9/0042: {containing silicon}
- C08J 2375/08: from polyethers
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- A43B: CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Disclosed are a dynamic non-wicking PU foam and preparation and application thereof The PU foam is prepared from polyether polyol, toluene-2,4-diisocyanate, non-wicking additive and auxiliary agent. The dynamic non-wicking additive is composed of carboxylic acids, amines and alkyl alcohols in any proportion. The auxiliary agent is composed of silicone surfactant, amine promoter, tin catalyst, pigment and water. The dynamic non-wicking PU foam has a high stability and an extremely non-wicking effect. The shoes made of the dynamic non-wicking PU foam also have extremely good dynamic non-wicking and waterproof effects, thus ensuring both comfort and stability of quality.

## Claims

### Claim 1

A dynamic non-wicking polyurethane (PU) foam, wherein the dynamic non-wicking polyurethane (PU) foam is prepared from the following components by weight percentage on the basis of the total dynamic non-wicking polyurethane (PU) foam:
Polyether polyol: 62.6-75.4%,
Diisocyanate: 15.9-26.2%,
Dynamic non-wicking additive: 5.6-7.2%, and
Auxiliary agent: 3.1-4.0%;
wherein the dynamic non-wicking additive is one of (i) carboxylic acids, (ii) amines or (iii) alkyl alcohols, or (iv) is composed of carboxylic acids, amines, and alkyl alcohols in any proportion, wherein the carboxylic acids and the amines contain alkyl groups having a total of 8-20 carbon atoms, and the alkyl alcohols contain alkyl groups having a total of 11-20 carbon atoms; and
the auxiliary agent is composed of the following components by weight percentage on the basis of the total auxiliary agent:
Silicone surfactant: 18.8-33.2%,
Amine promoter: 3.1-7.6%,
Tin catalyst: 3.2-7.3%,
Pigment: 20.4-24.8 %, and
Water: 35.6-46.0%.

### Claim 2 (depends on 1)

The dynamic non-wicking PU foam of claim 1, wherein the diisocyanate is toluene-2,4-diisocyanate.

### Claim 3 (depends on 1)

The dynamic non-wicking PU foam of claim 1, wherein the dynamic non-wicking additive is composed of the following components by weight percentage on the basis of the total dynamic non-wicking additive:
carboxylic acids: 18.8-38.6%
amines: 29.6-34.4%
alkyl alcohols: 31.8-46.8%.

### Claim 4 (depends on 1)

The dynamic non-wicking PU foam of claim 1, wherein the amine promoter is composed of triethylene diamine and dipropylene glycol.

### Claim 5 (depends on 1)

The dynamic non-wicking PU foam of claim 1, wherein the tin catalyst is stannous octoate.

### Claim 6 (depends on 1)

A method for preparing the dynamic non-wicking PU foam of claim 1, comprising the steps of:
(1) premixing the polyether polyol, the dynamic non-wicking additive and the auxiliary agent and stirring until a uniform mixture is made;
(2) adding the diisocyanate which comprises toluene-2,4-diisocyanate to the mixture obtained in step (1);
(3) stirring at a rotation speed of 2500-6000 revolutions per minute until a uniform mixture is made; and
(4) placing the mixture at room temperature for 1-3 days to obtain the dynamic non-wicking PU foam.

### Claim 7 (depends on 6)

The method of claim 6, wherein, in step (2), stirring is accomplished at a rotation speed of 5000 revolutions per minute.

### Claim 8 (depends on 1)

A method of preparing the upper vamps, tongues, and collars of waterproof shoes comprising forming the upper vamps, tongues, and collars of waterproof shoes from the dynamic non-wicking PU foam of claim 1.